感度領域の長さを動的に調整可能なインライン・マッハ・ツェンダー干渉計による温度計測技術を提案した論文が Applied Physics Express に掲載されました。芝浦工業大学の李助教が中心となって進めた共同研究の成果です。
H. Lee, C. Zhao, T. Kiyozumi, K. Nakamura, and Y. Mizuno, “Fiber-optic temperature sensor based on inline core-cladding-mode Mach-Zehnder interferometry with dynamically controllable sensing length,” Appl. Phys. Express, vol. 15, no. 2, 022002 (2022).
A variety of fiber-optic temperature sensors based on inline Mach-Zehnder interferometry have been implemented for their ease of fabrication and cost efficiency, but it is difficult to control the length of the sensing area (i.e., the fiber section with sensitivity). Herein, we develop a new temperature sensor based on inline Mach-Zehnder interferometry by connecting two single-mode fibers (SMFs) with different mode-field diameters and by applying a load to one of the SMFs. The fiber section between the connector and the load operates as the sensing area, the length of which can be dynamically controlled by changing the load position.